gnuplot, 84 bytes

Result

AC

Duration

752ms

Code [DL]

set print "-"
i=1
while(i){print(y=word(ARG1,i+1)/10)%11?word(ARG1,i)%10:y/10
i=i+2}

stdin

859 595
219 256
521 113
624 498
647 754
423 339
296 933
969 385
623 327
951 886
477 576
497 792
955 227
266 662
368 387
995 196
874 957
883 833
733 331
644 432
157 376
147 448
139 669
133 927
242 945
722 239
688 363
874 778
477 571
894 967
344 331
182 711

stdout

9
9
1
4
7
3
6
9
3
8
7
7
2
6
8
5
4
3
3
4
7
4
6
3
2
2
8
7
7
4
3
2

stderr

"/volume/CODE" line 3: Non-numeric string found where a numeric expression was expected

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffdaf5b2920 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x5571b0de9cf8 /* 7 vars */) = 0
12    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    execve("/usr/bin/gnuplot", ["/usr/bin/gnuplot", "-c", "/volume/CODE", "859 595\n219 256\n521 113\n624 498\n"...], 0x5571b25f7290 /* 7 vars */) = 0
13    +++ exited with 1 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=1, si_utime=0, si_stime=1} ---
11    +++ exited with 1 +++